A1: Redox Flashcards
1
Q
Define oxidation
A
Increase in oxidation number, loss of electrons
2
Q
Define reduction
A
Decrease in oxidation number, gain of electrons
3
Q
Define oxidation number
A
The number of electrons involved in bonding to a different element
4
Q
Oxidation number of elements
A
0
5
Q
Oxidation number of ions (and in compounds)
A
same as ionic charge, except the sign comes first
6
Q
Oxidation number of H in metal hydrides (NaH, CaH2)
A
-1
7
Q
Oxidation number of O in peroxides (H2O2)
A
-1
8
Q
Oxidation number of O bonded tov F (F2O)
A
+2
9
Q
Which is oxidised and reduced in Zn + 2HCl
A
Zinc is oxidised, HCl is reduced
10
Q
Oxidation number of Iron(II)
A
+2
11
Q
Oxidation number of iron(III)
A
+3
12
Q
Oxidation number of N in NO2-
A
+3
13
Q
Oxidation number of S in H2SO4
A
+6
14
Q
A
